Apparatuses and Methods for an Improved Lath, Vapor Control Layer and Rain Screen Assembly

ABSTRACT

An improved lath and rain screen assembly for fastening to an exterior building surface or the like is provided. The lath and rain screen assembly comprises a rain screen configured to encourage ventilation and drying, and a lath configured to receive at least a portion of a first mortar layer. In various embodiments, the rain screen comprises a first and a second body, defining respective co-parallel first and second planes, while the lath comprises a third body spaced apart from and substantially parallel to at least the first plane. In certain embodiments, the first body and the lath are spaced apart so as to provide a first intermediate pathway. In certain embodiments, the first intermediate pathway is at least partially defined by the second body of the rain screen. A method of applying the improved lath and rain screen assembly is also provided.

BACKGROUND OF THE INVENTION

In the construction of buildings, frequently used construction products include exterior cladding materials. Exterior cladding materials can be used to cover the exterior surfaces formed from various framing structures. Non-limiting examples of exterior cladding materials include masonry products, such as for example, stone and brick and stucco.

In certain instances, the exterior building cladding is applied to sub-structures that are attached to the exterior surfaces of the framing structures. One example of a sub-structure is rain screens. Generally speaking, rain screens are configured to create a cavity between the exterior cladding materials and the exterior surface of the framing structure. The cavity allows weather-related moisture to easily pass through and away from the building. Another example of a sub-structure is laths. Laths are materials configured to support mortar or plasterwork.

Historically, rain screens and laths were provided as separate stand-alone products that could be sequentially attached to the exterior surfaces of framing structures. As a result, significant amounts of time were necessary for installation, contributing, at least in part, to increasingly rising occurrences of delay and cost overruns in a variety of projects contexts.

Further, traditional methods of installation of stand-alone rain screens and laths often inadvertently created moisture barriers between the rain screens and any moisture resistant layers incorporated between the rain screens and the exterior surfaces of the framing structures. Such led to potential issues regarding ventilation and drying due to impediments to the removal of both liquid water and water vapor.

Accordingly, it would be advantageous if various sub-structures could be improved to alleviate these and other problems and inefficiencies.

SUMMARY OF THE INVENTION

In accordance with the purposes of the present invention as described herein, an improved lath and rain screen assembly is provided for fastening to an exterior building surface. The lath and rain screen assembly comprises a rain screen configured to encourage ventilation and drying, and a lath configured to receive at least a portion of a first mortar layer. The rain screen comprises 1) a first substantially planar body, the first body having a nominal thickness and opposing primary planar first and second sides, the first body further defining a first plane; and 2) a second substantially planar body, the second body having a nominal thickness and opposing primary planar first and second sides, the first side being operably connected to the second side of the first body, the second body further defining a second plane, the second plane being substantially parallel to the first plane of the first body. The lath comprises a third substantially planar body having a nominal thickness, the third body being operably connected to the second side of the second body, the third body further defining a third plane spaced apart from and substantially parallel to the first plane. In this manner, according to certain embodiments, at least the first body of the rain screen and the third body of the lath are spaced apart so as to provide a first intermediate pathway therebetween configured for permitting the passage of liquid water and water vapor.

In accordance with an additional aspect of the present invention as described herein, a lath and rain screen assembly is provided for fastening to an exterior building surface. The lath and rain screen assembly comprises a rain screen configured to encourage ventilation and drying, and a lath configured to receive at least a portion of a first mortar layer. The rain screen comprises 1) a first substantially planar body, the first body having a nominal thickness and opposing primary planar first and second sides, the first body further defining a first plane; 2) a second substantially planar body, the second body having a nominal thickness and opposing primary planar first and second sides, the first side being operably connected to the second side of the first body, the second body further defining a second plane, the second plane being substantially parallel to the first plane of the first body; and 3) a fourth substantially planar body, the fourth body having a nominal thickness and opposing primary planar first and second sides, the second side being operably connected to the first side of the first body, the first side defining a fourth plane, the fourth plane being spaced apart from and substantially parallel to the first plane of the first body. The lath comprises a third substantially planar body having a nominal thickness, the third body being operably connected to the second side of the second body, the third body further defining a third plane spaced apart from and substantially parallel to the first plane. In this manner, according to certain embodiments, at least the first body of the rain screen and the third body of the lath are spaced apart so as to provide a first intermediate pathway therebetween configured for permitting the passage of liquid water and water vapor. In various embodiments, the fourth body substantially defines a second intermediate pathway, the second pathway being located substantially between the fourth plane of the fourth body and the first plane of the first body, and the second pathway being configured for permitting the passage of liquid water and water vapor.

In accordance with an additional aspect of the present invention, a method of applying an improved lath and rain screen assembly to an exterior building surface is provided. The method comprises the steps of: A) providing a rain screen configured to encourage ventilation and drying, the rain screen including: 1) a first substantially planar body, the first body having a nominal thickness and opposing primary planar first and second sides, the first body further defining a first plane; and 2) a second substantially planar body, the second body having a nominal thickness and opposing primary planar first and second sides, the first side being operably connected to the second side of the first body, the second body further defining a second plane, the second plane being substantially parallel to the first plane of the first body; B) providing a lath configured to receive at least a portion of a first mortar layer, the lath including a third substantially planar body having a nominal thickness, the third body being operably connected to the second side of the second body, the third body further defining a third plane spaced apart from and substantially parallel to the first plane; and C) providing the lath and rain screen assembly by connecting the rain screen and the lath, such that at least the first body of the rain screen and the third body of the lath are spaced apart so as to provide a first intermediate pathway therebetween configured for permitting the passage of liquid water and water vapor.

In accordance with an additional aspect of the present invention, a method of applying an improved lath and rain screen assembly to an exterior building surface is provided. The method comprises the steps of: A) providing a rain screen configured to encourage ventilation and drying, the rain screen including: 1) a first substantially planar body, the first body having a nominal thickness and opposing primary planar first and second sides, the first body further defining a first plane; and 2) a second substantially planar body, the second body having a nominal thickness and opposing primary planar first and second sides, the first side being operably connected to the second side of the first body, the second body further defining a second plane, the second plane being substantially parallel to the first plane of the first body; B) providing a lath configured to receive at least a portion of a first mortar layer, the lath including a third substantially planar body having a nominal thickness, the third body being operably connected to the second side of the second body, the third body further defining a third plane spaced apart from and substantially parallel to the first plane; C) providing the lath and rain screen assembly by connecting the rain screen and the lath, such that the first body of the rain screen and the third body of the lath are spaced apart so as to provide a first intermediate pathway therebetween configured for permitting the passage of liquid water and water vapor; D) positioning the lath and rain screen assembly adjacent the exterior building surface; E) applying a first layer of mortar onto the lath; and F) attaching a plurality of exterior cladding materials to the lath at least partially with the use of the mortar.

Various advantages of this invention will become apparent to those skilled in the art from the following detailed description of the invention, when read in light of the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings incorporated herein and forming a part of the specification, illustrate several aspects of the present invention and together with the description serve to explain certain principles of the invention. In the drawings:

FIG. 1 is an exploded perspective view of an improved lath and rain screen assembly according to various embodiments;

FIG. 2 is a side view, in elevation, of the lath and rain screen assembly of FIG. 1;

FIG. 3 is a cross sectional side view, in elevation, illustrating the lath and rain screen assembly of FIG. 1 installed on exterior building framework and configured to support exterior cladding material in the form of masonry products;

FIG. 4 is a side view, in elevation, illustrating the lath and rain screen assembly of FIG. 1 installed on exterior building framework and configured to support exterior cladding material in the form of stucco;

FIG. 5 is a front view of two drainage and ventilation layers of the rain screen of the lath and rain screen assembly of FIG. 1;

FIG. 6 is a front view of an improved lath of the lath and rain screen assembly according to additional various embodiments; and

FIG. 7 is a front view of the lath and rain screen assembly according to even further various embodiments.

Reference will now be made in detail to the present preferred embodiment of the invention, examples of which are illustrated in the accompanying drawings.

DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS OF THE INVENTION

Various embodiments of the present invention will now be described more fully hereinafter with occasional reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for describing particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Unless otherwise indicated, all numbers expressing quantities of dimensions such as length, width, height, and so forth as used in the specification and claims are to be understood as being modified in all instances by the term “about.” Accordingly, unless otherwise indicated, the numerical properties set forth in the specification and claims are approximations that may vary depending on the desired properties sought to be obtained in embodiments of the present invention. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical values, however, inherently contain certain errors necessarily resulting from error found in their respective measurements.

The description and figures disclose lath and rain screen assemblies configured for attachment to an exterior building framework and further configured as a support surface for external cladding materials. The term “lath”, as used herein, is defined to mean a pattern of material configured to support mortar or plasterwork. The term “rain screen”, as used herein, is defined to mean an infrastructure positioned on exterior building framework and configured to (1) create a cavity that allows weather-related moisture to easily pass through and away from the building; and (2) provide the potential for ventilation and drying to assist in the removal of both liquid water and water vapor. The term “external cladding material”, as used herein, is defined to mean a covering of one or more materials on the exterior of a building.

Referring now to FIGS. 1 and 2, a first embodiment of a lath and rain screen assembly is shown generally at 10. Generally, the lath and rain screen assembly 10 according to various embodiments is attached to an exterior framework of a building and configured as a support for subsequently installed exterior cladding materials, such as for example, masonry products, stonework or stucco. As will be described in more detail below, the lath and rain screen assembly 10, in certain embodiments, further forms one or more air and moisture pathways between the exterior framework of the building and the exterior cladding material. The air and moisture pathways are configured in these embodiments to allow drainage, ventilation, and removal of any air and/or moisture that may exist between the exterior framework of the building and the exterior cladding material. As will be further discussed below, the lath and rain screen assembly 10 can be provided to installers in the form of a roll. As a result, in various embodiments, installation of the lath and rain screen assembly 10 can be as simple as unrolling against and fastening adjacent rows of the lath and rain screen assembly 10 to the exterior framework of a building.

Referring again to FIGS. 1 and 2, the lath and rain screen assembly 10 is formed according to various embodiments from the assembly of a rain screen 12 and a lath 14. The rain screen 12, in various embodiments, includes at least first sheet 15, a second sheet 16, and a third sheet 17. The body of the rain screen 12 can be thought of as being generally planar with a nominal thickness intermediate opposing primary planar first and second sides, with the first and second sides lying in corresponding first and second co-parallel planes.

The first sheet 15 of the rain screen 12, according to various embodiments, as shown in FIG. 2, may have a thickness 54. In the illustrated embodiment, the thickness 54 of the first sheet 15 is in a range of from about 0.125 inches to about 0.375 inches. In other embodiments, the thickness 54 of the first sheet 15 may be less than about 0.125 inches or more than about 0.375 inches. In still other embodiments, the thickness 54 of the first sheet 15 may be in a range of from about 0.0625 inches to about 0.50 inches.

Turning to FIGS. 1 and 5, the first sheet 15 of the rain screen 12 according to various embodiments may be formed from a polymer-based material, such as for example polyvinyl chloride. In other embodiments, the first sheet 15 may be formed from other polymer-based materials, including the non-limiting examples of polystyrene, polyethylene and polypropylene. In still other embodiments, the first sheet 15 may be formed from any of a variety of combinations of polymer-based materials, as commonly known and understood in the art.

In various embodiments, as best understood from FIG. 5, the first sheet 15 may be formed from a plurality of polymer-based fibers 82. In certain embodiments, the fibers 82 may loosely spun such that they may be loosely intertwined relative to one another so as to create a plurality of apertures 84 positioned throughout the first sheet 15. In this and other envisioned embodiments, the spun fibers 82 may be loosely intertwined by drizzling the spun fibers, when in a heated state, over a molded shape (not shown), and subsequently allowing the spun fibers to cool and thus harden into the sheet form, as depicted. Alternatively, the spun fibers 82 may, in still other embodiments, be loosely intertwined by any of a variety of industrial processes, as commonly known and understood in the art. In any of these and still other envisioned embodiments, the degree with which the spun fibers 82 are loosely intertwined may, at least in part, influence the permeability characteristics of the first sheet 15, as described in further detail below.

Returning to FIG. 1, the first sheet 15 according to various embodiments, may exhibit a substantially planar structural shape. In certain embodiments, as will be described in further detail below, the substantially planar structure enables attachment (e.g., during the manufacturing assembly process) of the first sheet 15 with at least one side of the second sheet 16 of the rain screen 12. In these and other embodiments, the substantially planar structural shape is achieved during the process of forming the first sheet 15, such as, for example, by drizzling the spun fibers 82 of the first sheet 15 over a substantially planar mold (as previously discussed, and not shown). In still other embodiments, the first sheet 15 may exhibit any of a variety of structural shapes, such as the non-limiting example of a washboard structure, provided any such structural shape is sufficient to provide support for subsequently installed external cladding material, as described in further detail below.

In various embodiments, the first sheet 15 may be configured for moisture transmission (e.g., drainage and ventilation). That is, the first sheet 15 may be configured to minimally, if at all, impede the flow of gases (e.g. air and moisture) that may be trapped between exterior framework of the building and the second sheet 16 of the rain screen 12, as will be described in further detail below. In the illustrated embodiment, the first sheet 15 has a permeability value in a range of from about 15 perms to about 35 perms, as determined by water vapor transmission tests, such as, for example Standard E-96. Typical water vapor transmission tests of this nature evaluate the transfer of water vapor through semi-permeable and permeable materials over a period of time. In other embodiments, the first sheet 15 may have a permeability rating of less than about 15 perms or more than about 35 perms. In still other embodiments, the first sheet 15 may have any of a variety of commonly considered “very high” permeability ratings, provided such minimally impede the transportation of any trapped gases through and/or along the first sheet 15.

The second sheet 16 of the rain screen 12, according to various embodiments, as shown in FIG. 2, may have a thickness 75. In the illustrated embodiment, the thickness 75 of the second sheet 16 is in a range of from about 1/64 inches to about ⅛ inches. In other embodiments, the thickness 75 of the second sheet 16 may be less than about 1/64 inches or more than about ⅛ inches. In still other embodiments, the thickness 75 of the second sheet 16 may be in a range of from about 0.005 inches to about 0.50 inches.

Turning to FIGS. 1 and 5, the second sheet 16 of the rain screen 12 according to various embodiments may be formed from a polymer-based material, such as for example polyvinyl chloride. In other embodiments, the second sheet 16 may be formed from other polymer-based materials, including the non-limiting examples of polystyrene, polyethylene and polypropylene. In still other embodiments, the second sheet 16 may be formed from any of a variety of combinations of materials, as commonly known and understood in the art to substantially retard the transmission of moisture, as will be described in further detail below. In any of these and any other envisioned embodiments, the second sheet 16 may be formed from substantially the same material as the first sheet 15 and/or the third sheet 17 of the rain screen 12, while in still other envisioned embodiments the material of any of the three sheets may be substantially different relative to one another.

In still other various envisioned embodiments (not shown, but best understood from at least FIGS. 1 and 2, at least a portion of the second sheet 16 may further include any of a variety of materials having a self-sealing property. Such self-sealing properties enable the second sheet 16 of such embodiments to create moisture-tight (e.g., water-tight) seals around any nails and/or nail holes created in the second sheet. In at least one of such embodiments, the self-sealing material may be the non-limiting example of rubber, although any of a variety of analogous materials, as commonly known and understood in the art. Further, in certain embodiments, the self-sealing material may be embedded within the second sheet 16 during the manufacturing process, while, in still other embodiments, the self-sealing material may be coated upon or even drizzled over one or more surfaces of the second sheet 16, as may be desired for a particular application.

Returning to FIG. 1, the second sheet 16 according to various embodiments, may exhibit a substantially planar structural shape. In certain embodiments, as will be described in further detail below, the substantially planar structure enables attachment (e.g., during the manufacturing assembly process) of the second sheet 16 with at least one side of each of the first 15 and the third 17 sheets of the rain screen 12. In still other embodiments, the second sheet 16 may exhibit any of a variety of structural shapes, such as the non-limiting example of a washboard structure, provided any such structural shape is sufficient to provide support for subsequently installed external cladding material, as described in further detail below. In any of these and any other envisioned embodiments, the second sheet 16 may be formed to have substantially the same structural shape as the first sheet 15 and/or the third sheet 17 of the rain screen 12, while in still other envisioned embodiments the structural shape of any of the three sheets may be substantially different relative to one another.

In various embodiments, the second sheet 16 may be configured for moisture transmission. That is, unlike at least the first sheet 15 and the third sheet 17 (as described in further detail below), the second sheet 16 may be configured to substantially retard the flow of gases (e.g. air and moisture), without requiring the use of a separate vapor or air barrier or an incorporated vapor or air barrier. In at least the illustrated embodiment, the second sheet 16 has a permeability value in a range of from about 0.06 perms to about 5 perms, as determined by water vapor transmission tests, such as, for example Standard E-96. Typical water vapor transmission tests of this nature evaluate the transfer of water vapor through semi-permeable and permeable materials over a period of time. In other embodiments, the second sheet 16 can have a permeability rating of less than about 0.06 perms or more than about 5 perms.

The third sheet 17 of the rain screen 12, according to various embodiments, as shown in FIG. 2, may have a thickness 56. In the illustrated embodiment, the thickness 56 of the third sheet 17 is in a range of from about 0.125 inches to about 0.375 inches. In other embodiments, the thickness 56 of the third sheet 17 may be less than about 0.125 inches or more than about 0.375 inches. In still other embodiments, the thickness 56 of the third sheet 17 may be in a range of from about 0.0625 inches to about 0.50 inches. In certain embodiments, the thickness 56 of the third sheet 17 may be substantially the same as the thickness 54 of the first sheet 15, while in still other embodiments the thicknesses may be substantially different relative to one another. The sheets, 15, 16, and 17, may further, according to various embodiments, have a combined thickness 55 that is in a range of from about 0.375 inches to about 0.625 inches. In other embodiments, the thickness 55 may be approximately 0.50 inches. In still other embodiments, the thickness 55 may be less than about 0.375 inches or more than about 0.625 inches.

Returning now to FIGS. 1 and 5, the third sheet 17 of the rain screen 12 according to various embodiments may be formed from a polymer-based material, such as for example polyvinyl chloride. In other embodiments, the third sheet 17 may be formed from other polymer-based materials, including the non-limiting examples of polystyrene, polyethylene and polypropylene. In still other embodiments, the third sheet 17 may be formed from any of a variety of combinations of polymer-based materials, as commonly known and understood in the art. In any of these and any other envisioned embodiments, the third sheet 17 may be formed from substantially the same material as the first sheet 15 and/or the second sheet 16 of the rain screen 12, while in still other envisioned embodiments the material of any of the three sheets may be substantially different relative to one another.

In various embodiments, as best understood from FIG. 5, the third sheet 17 may be formed from a plurality of polymer-based fibers 86. In certain embodiments, the fibers 82 may loosely spun such that they may be loosely intertwined relative to one another so as to create a plurality of apertures 88 positioned throughout the third sheet 17. In this and other envisioned embodiments, the spun fibers 86 may be loosely intertwined by drizzling the spun fibers, when in a heated state, over a molded shape (not shown), and subsequently allowing the spun fibers to cool and thus harden into the sheet form, as depicted. Alternatively, the spun fibers 86 may, in still other embodiments, be loosely intertwined by any of a variety of industrial processes, as commonly known and understood in the art.

Even further, as also evident from at least FIG. 5, the spun fibers 86 may, according to various embodiments, be spun into relatively thicker straps (not shown), which may in turn be loosely intertwined by any of a variety of industrial processes, as described herein, or otherwise commonly known and understood in the art. In any of these and still other envisioned embodiments, the degree with which the spun fibers 86 (and/or straps) are loosely intertwined may, at least in part, influence the permeability characteristics of the third sheet 17, as described in further detail below. In any of these and any other envisioned embodiments, the fibers 86 (and/or straps) of the third sheet 17 may be spun, loosely intertwined, and/or drizzled over a mold or pan in substantially the same manner as used to form the first sheet 15 of the rain screen 12, while in still other envisioned embodiments, the manner of formation (e.g., spinning, intertwining, and/or drizzling) 1 of the first and third sheets may be substantially different relative to one another.

Returning to FIG. 1, the third sheet 17 according to various embodiments, may exhibit a substantially planar structural shape. In certain embodiments, as will be described in further detail below, the substantially planar structure enables attachment (e.g., during the manufacturing assembly process) of the third sheet 17 with at least one side (e.g., that opposite of the side to which the first sheet 15 is attached) of the second sheet 16 of the rain screen 12. In these and other embodiments, the substantially planar structural shape is achieved during the process of forming the third sheet 17, such as, for example, by drizzling the spun fibers 86 of the third sheet 17 over a substantially planar mold (as previously discussed, and not shown). In still other embodiments, the third sheet 17 may exhibit any of a variety of structural shapes, such as the non-limiting example of a washboard structure, provided any such structural shape is sufficient to provide support for subsequently installed external cladding material, as described in further detail below. In any of these and any other envisioned embodiments, the third sheet 17 may be formed to have substantially the same structural shape as the first sheet 15 and/or the second sheet 16 of the rain screen 12, while in still other envisioned embodiments the structural shape of any of the three sheets may be substantially different relative to one another.

In various embodiments, the third sheet 17 may be configured for moisture transmission (e.g., drainage and ventilation). That is, the third sheet 17 may be configured to minimally, if at all, impede the flow of gases (e.g. air and moisture) that may be trapped between the second sheet 16 of the rain screen 12 and the external cladding material, as will be described in further detail below. In the illustrated embodiment, the third sheet 17 has a permeability value in a range of from about 15 perms to about 35 perms, as determined by water vapor transmission tests, such as, for example Standard E-96. Typical water vapor transmission tests of this nature evaluate the transfer of water vapor through semi-permeable and permeable materials over a period of time. In other embodiments, the third sheet 17 may have a permeability rating of less than about 15 perms or more than about 35 perms. In still other embodiments, the third sheet 17 may have any of a variety of commonly considered “very high” permeability ratings, provided such minimally impede the transportation of any trapped gases through and/or along the third sheet 17. In any of these and any other envisioned embodiments, the permeability rating of the third sheet 17 may be substantially the same as that of the first sheet 15 of the rain screen 12, while in still other envisioned embodiments the permeability ratings of the first and third sheets may be substantially different relative to one another.

Referring again to FIGS. 1 and 2, the sheets, 15, 16, and 17, according to various embodiments, each have a height H and a length L. In the illustrated embodiment, the height H of each of the sheets, 15, 16, and 17, may be a range of from about 3.0 ft to about 4.0 ft. In other embodiments, the height H of the sheets, 15, 16, and 17, may be less than about 3.0 ft or more than about 4.0 ft. In still other embodiments, the height H of the sheets, 15, 16, and 17, may be in a range from approximately 2.0 ft to about 6.0 ft. In the illustrated embodiment, the length L of each of the sheets, 15, 16, and 17, is in a range of from about 25.0 ft. to about 100.0 ft. In other embodiments, the length L of the sheets, 15, 16, and 17, may be approximately 50.0 ft. In still other embodiments, the length L of the sheets, 15, 16, and 17, may be any desired length based on a variety of considerations such as, for example, the diameter (and potentially weight) of the sheets in a rolled form. In any of these and any other envisioned embodiments, the heights H of the sheets, 15, 16, and 17, may be substantially the same relative to each other, while in still other envisioned embodiments the heights H of the sheets, 15, 16, and 17, may be substantially different relative to one another.

Returning to FIG. 1, according to various embodiments the lath 14 of the lath and rain screen assembly 10 includes a sheet 30 having a plurality of spaced apart apertures 32. As will be discussed in more detail below, the sheet 30 and the apertures 32 are generally configured in various embodiments to provide support for subsequently installed external cladding materials. In the illustrated embodiment, the sheet 30 is formed from a fiberglass-based material such as, for example, alkaline resistant (AR) fiberglass. In other embodiments, the sheet 30 may be formed from other materials sufficient to provide a comparable degree of support for subsequently installed external cladding material. In one such other embodiment, the sheet 30 may be formed from a combination (e.g., a blend) of AR fiberglass and poly-based fiber, which provides the requisite degree of support. In still other embodiments, the sheet 30 may be woven in nature.

In those embodiments having a woven sheet 30, the sheet may be formed by threading (e.g., weaving) a plurality of individual fibers 31 into a plurality of straps 33, each of the straps comprising a portion of the plurality of individual fibers, as generally shown in FIG. 6. According to these various embodiments, each of the straps 33 may then be threaded with a plurality of similarly formed straps 33 to form a mesh or lattice-like structure constituting the lath 14. Notably, the weaving of the individual fibers 31 and the plurality of straps 33 relative to one another may be performed sequentially (as described above), or simultaneously, as shown in FIG. 6, whereby the individual fibers 31 of respective straps 33 further intertwine adjacently woven straps. It should be understood that the specific manner of threading (e.g., weaving) to form this mesh or lattice-like configuration may be through any of a variety of techniques, as commonly known and understood in the art of weaving.

Returning to FIG. 2, the sheet 30 according to various embodiments may have any desired thickness sufficient to provide support for subsequently installed external cladding material. In certain embodiments, the sheet 30 may have a thickness 76 that is in a range of from about 1/64 inches to about 0.25 inches. In other embodiments, the thickness 76 may be approximately 1/32 inches. In still other embodiments, the thickness 76 may be less than about 1/64 inches or more than about 0.25 inches. In any of these and other embodiments, an overall thickness 77 of the lath and rain screen assembly 10, namely the summation of the rain screen 12 (e.g., the three combined sheets, 15, 16, and 17) and the sheet 30 of the lath 14 may be in a range from about 0.50 inches to about 0.75 inches. In other embodiments, the overall thickness 77 may be approximately 9/16 of an inch. In still other embodiments, the overall thickness 77 may be less than about 0.50 inches or more than about 0.75 inches.

In various embodiments, the spaced apart apertures 32 form a mesh or grid structure for the sheet 30, as generally depicted in at least FIGS. 1 and 6. In certain embodiments, where the sheet 30 is formed of a fiberglass or a fiberglass blend material, the apertures 32 may have a generally rectangular shape resulting from the lath 14 being woven into a mesh or lattice-like structure as discussed above. In various embodiments, the mesh structure is woven such that the apertures 32 have a major dimension in a range of from about 0.10 inches to about 0.50 inches. In certain embodiments, the apertures 32 may have a major dimension of less than 0.10 inches or more than about 0.50 inches, depending on the degree of support desired from the assembled lath and rain screen assembly 10. In other embodiments, the apertures 32 may have other shapes or configurations such as, for example, the non-limiting options of a circular shape, a triangular shape, or an oval shape.

Referring now again to FIG. 2, the respective sheets 15, 16, and 17 of the rain screen 12 are shown assembled together with the lath 14 according to various embodiments so as to form the lath and rain screen assembly 10. In the assembled configuration of certain embodiments, the lath 14 is attached to and supported by a second side (e.g., the right-most side, as depicted in FIG. 2) of the third sheet 17 of the rain screen 12. In the illustrated embodiment, the lath 14 is attached to the first side of the third sheet 17 by a heat bonding process. In other embodiments, the lath 14 may be attached to the third sheet 17 by other processes, including the non-limiting examples of adhesives or mechanical fasteners.

As may also be understood from FIG. 2, the respective sheets 15, 16, and 17 of the rain screen 12 according to various embodiments may be likewise attached to and supported relative to one another. In certain embodiments, a first side (e.g., the left-most side, as depicted in FIG. 2) of the first sheet 15 may be attached to an exterior building framework, as will be described in further detail below. In those and other embodiments, a second side (e.g., the right-most side, as depicted in FIG. 2) of the first sheet 15 may be attached to a first side (e.g., the left-most side) of the second sheet 16, while a second side of the second sheet may further be attached to a first side of the third sheet 17 such that the second sheet 16 is positioned substantially intermediate the first sheet 15 and the third sheet. It should be understood that in still other embodiments (not shown), the sheets 15, 16, and 17 may be attached relative to each other in any of a variety of orders, as may be desired for a particular application.

Further, any combination of each of the sheets 15, 16, and 17 according to various embodiments may be attached relative to one another by a heat bonding process. In other embodiments, any combination of each of the sheets 15, 16, and 17 may be attached relative to one another by other processes, including the non-limiting examples of adhesives or mechanical fasteners. In these and still other embodiments, it should be understood that one or more of the sheets 15, 16, and 17 may be attached relative to one another by substantially the same process as the lath 14 may be attached to, for example, the third sheet 17. Alternatively, one or more of the sheets 15, 16, and 17 may be attached relative to one another by substantially differently from the process used to attach the lath 14 relative to, for example, the third sheet 17.

Referring now to FIG. 7, according to various embodiments, the lath 14 may be sized such that, when attached to the fibers 86 of the third sheet 17, one corner of every other aperture 32 within a set of four apertures 32 each contacts four adjacently positioned fibers 86. Such is generally depicted in FIG. 7 as configuration A, whereby four apertures 32 are positioned substantially within a perimeter defined by four adjacently positioned fibers 86. In other embodiments, the lath 14 may be sized such that, when attached to the fibers 86, one corner of every fourth aperture 32 within a set of sixteen apertures 32 each contacts four adjacently positioned fibers 86. Such is generally depicted in FIG. 7 as configuration B, whereby sixteen apertures 32 are positioned substantially within a perimeter defined by four adjacently positioned fibers 86. In still other embodiments, the lath 14 may be sized in any of a variety of manners such that any of a variety of numbers of apertures 32 reside within a perimeter defined by four adjacently fibers 86, thereby capturing any of a variety of aperture sizes, as may be desired or envisioned for a particular degree of support inherent to the lath 14.

Referring now to FIG. 3, the lath and rain screen assembly 10 according to various embodiments used with exterior cladding material is illustrated. A portion of a building is illustrated generally at 40. The building 40 includes an exterior facing wall 42. The wall 42 is configured to define interior space within the building 40 and to support additional structural components. Among other building components, the wall 42 according to certain embodiments is formed from a plurality of framing members 44 extending in both vertical and horizontal directions. In the illustrated embodiment, the framing members 44 are made of wood. In other embodiments, the framing members 44 can be made of other desired materials, including the non-limiting example of steel. Further, the framing members 44 according to various embodiments may have any of a variety of desired dimensions.

Referring again to FIG. 3, the exterior wall 42 according to various embodiments is covered by exterior sheathing 46 attached to an exterior side of the framing members 44. In certain embodiments, the exterior sheathing 46 is configured to provide rigidity to the exterior wall 42. In other embodiments, the exterior sheathing 46 is further configured to provide a surface for sub-structures and exterior cladding material. In the illustrated embodiment, the exterior sheathing 46 is made of oriented strand board (OSB). In other embodiments, the exterior sheathing 46 may be made of other materials, such as for example the non-limiting options of plywood, waferboard, rigid foam, or fiberboard, so long as such options provide a sufficient degree of rigidity to the exterior wall 42 and a surface for receiving sub-structures and exterior cladding material. Further, the exterior sheathing 46 according to various embodiments has an exterior surface 48.

According to various embodiments, as shown in FIG. 3, a moisture resistant layer 50 may also be attached to the exterior surface 48 of the exterior sheathing 46. The moisture resistance layer 50 is configured to substantially retard the flow of gases (e.g. air and moisture) through and between the exterior of the building and the interior of the building. One example of a moisture resistance layer 50 is PINK WRAP® marketed by Owens Corning Corporation, headquartered in Toledo, Ohio. In other embodiments, the moisture resistant layer 50 may be traditional building paper. In still other embodiments, a moisture resistant layer 50 may not be present at all.

In various embodiments, the moisture resistant layer 50 may have any desired thickness and any desired permeability value. In the illustrated embodiment of FIG. 3, the moisture resistant layer 50 is fastened to the exterior surface 48 of the exterior sheathing 46 by staples (not shown). However, it should be appreciated that in other embodiments, the moisture resistant layer 50 may be fastened to the exterior surface 48 of the exterior sheathing 46 by any of a variety of other desired methods or means.

Referring again to FIG. 3, the lath and rain screen assembly 10 according to various embodiments is positioned over the moisture resistant layer 50 and fastened to the exterior sheathing 46 using a plurality of spaced apart fasteners 52. In the illustrated embodiment, the fasteners 52 are staples. Alternatively, other desired fasteners, sufficient to fasten the lath and rain screen assembly 10 to the exterior sheathing 46 can be used in other embodiments. In certain embodiments, the fasteners 52 can be spaced apart a distance in a range of from about 4.0 inches to about 8.0 inches. In other embodiments, the fasteners 52 can be spaced apart a distance less than about 4.0 inches or more than about 8.0 inches. In still other embodiments that do not incorporate the moisture resistant layer 50, the fasteners 52 can be used to attach the lath and rain screen assembly 10 directly to the exterior sheeting 46.

As shown in at least FIGS. 2 and 3, in the installed position, various embodiments of the lath and rain screen assembly 10 include a first sheet 15 having a thickness 54, which itself at least partially defines a first space or cavity 94 (see, in particular, FIG. 2) between the moisture resistant layer 50 (or, alternatively, the exterior sheathing 46) and the second sheet 16. In certain embodiments, the first space 94 provides for moisture management behind the second sheet 16 of the lath and rain screen assembly 10 in two forms. First, in various embodiments, the first space 94 creates a pathway for moisture to pass through and/or exit the first space flowing in the direction indicated by the leftmost arrow D1 (see, in particular, FIG. 3). Second, in various embodiments, the first space 94 provides a pathway for ventilation air to pass through and/or exit the first space flowing in the direction indicated by the leftmost arrow D2. Notably, in certain embodiments, the first space 94 may, alternatively or concurrently, provide for moisture management in the direction indicated by the leftmost arrow D2 with ventilation provided in the direction indicated by the leftmost arrow D1. In still other embodiments, the first space 94 may provide moisture management and ventilation features in any of a variety of envisioned combinations of the directions indicated by the leftmost arrows D1 and D2.

In various embodiments, the first space 94 has a width, as generally depicted in FIG. 3, in a range of from about 0.125 inches to about 0.375 inches. In other embodiments, the width of the first space 94 may be less than about 0.125 inches or more than about 0.375 inches. In still other embodiments, the width of the first space 94 of the first sheet 15 may be in a range of from about 0.0625 inches to about 0.50 inches. In the illustrated embodiment, the width of the first space 94 is approximately 0.25 inches. In any of these and other envisioned embodiments, it should be understood that the width of the first space 94 is substantially the same as the thickness 54 of the first sheet 15, although in further alternative embodiments, the width of the first space and the thickness of the first sheet may be substantially different.

Referring again to at least FIGS. 2 and 3, in the installed position, various embodiments of the lath and rain screen assembly 10 include a third sheet 17 having a thickness 56, which itself at least partially defines a second space 96 between the second sheet 16 and the lath 14. In certain embodiments, the second space 96, in an analogous fashion as described above with respect to the first space 94, provides for moisture management between the lath 14 and rain screen 12 in two forms. First, in various embodiments, the second space 96 creates a pathway for moisture to pass through and/or exit the second space flowing in the direction indicated by the rightmost arrow D1. Second, in various embodiments, the second space 96 provides a pathway for ventilation air to pass through and/or exit the second space flowing in the direction indicated by the rightmost arrow D2. Notably, in certain embodiments, the second space 96 may, alternatively or concurrently, provide for moisture management in the direction indicated by the rightmost arrow D2 with ventilation provided in the direction indicated by the rightmost arrow D1. In still other embodiments, the second space 96 may provide moisture management and ventilation features in any of a variety of envisioned combinations of the directions indicated by the leftmost arrows D1 and D2.

In various embodiments, the second space 96, as depicted in at least FIGS. 2 and 3, is configured in certain embodiments to create a standoff to accommodate a thickness for a first layer 58 of subsequently installed mortar such that the mortar substantially encapsulates the lath 14.

In the illustrated embodiment, the thickness 56 of the third sheet 17 is in a range of from about 0.125 inches to about 0.375 inches. In other embodiments, the thickness 56 of the third sheet 17 may be less than about 0.125 inches or more than about 0.375 inches. In still other embodiments, the thickness 56 of the third sheet 17 may be in a range of from about 0.0625 inches to about 0.50 inches

In certain embodiments, a width of the second space 96 is in a range of from about 0.125 inches to about 0.375 inches, sufficient to accommodate a thickness of a first layer 58 of mortar (e.g., a scratch coat layer) of about 0.50 inches, thereby encapsulating the lath 14. In other embodiments, the width of the second space 96 may be less than about 0.125 inches or more than about 0.375 inches and may be configured to accommodate a thickness of the first layer 58 of mortar of more or less than approximately 0.50 inches. In the illustrated embodiment, the width of the second space 96 is approximately 0.25 inches, thereby accommodating a thickness of the first layer 58 of mortar sufficient to substantially encapsulate the lath 14. In other embodiments, the first layer 58 of mortar may be of sufficient thickness to totally encapsulate the lath 14. In still other embodiments, the first layer 58 of mortar may be of sufficient thickness to totally encapsulate the lath 14 and approximately 90% of the thickness 56 of the third sheet 17 of the rain screen 12. Any even further envisioned embodiments, the first layer 58 of mortar may be of sufficient thickness and/or the width of the second space 96 and/or the third sheet 17 may be appropriately dimensioned such that the first layer of mortar substantially encapsulates the lath 14 and at least a portion of the third sheet 17.

In various embodiments, a combined width (not numbered, but visible in at least FIG. 2) of the first space 94 and the second space 96 may be in a range of from about 0.25 inches to about 0.75 inches. In other embodiments, the combined width may be less than about 0.25 inches or more than about 0.75 inches. In the illustrated embodiment, the combined width is approximately 0.50 inches.

In various embodiments, as shown in FIG. 3, the first layer 58 (e.g., the scratch coat layer) of mortar substantially encapsulates (e.g., envelops) the lath 14. In certain embodiments, the first layer 58 of mortar fully encapsulates the lath 14. In other embodiments, as described above, the first layer 58 of mortar may fully encapsulate the lath 14 and also at least a portion of the third sheet 17 of the rain screen 12. Further, in various embodiments, the first layer 58 of mortar, when allowed to cure, forms a base for a second layer 60 of mortar. The second layer 60 of mortar is traditionally known as a “brown coat” and is used in various embodiments as a bedding layer for masonry products 62. In any of these various embodiments, the first and second layers, 58 and 60, of mortar can be any desired composition of mortar. Further, in any of these various embodiments, a rough texture may be applied to one or both of the first and second layers, 58 and 60, of mortar using, for example, a stucco comb or other comparable tools and methods.

While the various embodiments of the lath and rain screen assembly 10 illustrated in FIG. 3 provide support for the masonry products 62, it should be appreciated that in still other embodiments, the lath and rain screen assembly 10 can provide support for other exterior cladding materials. As a non-limiting example, a lath and rain screen assembly 110, as shown in FIG. 4 is configured to provide support for exterior cladding material in the form of stucco. In the illustrated embodiment, the lath 114, the first sheet 115, the second sheet 116, and the third sheet 117 of the lath and rain screen assembly 110 are substantially the same, or substantially similar in structure, shape, and/or configuration as the lath 14, the first sheet 15, the second sheet 16, and the third sheet 17 of the lath and rain screen assembly 10 illustrated in FIG. 3 and discussed above. Alternatively, in other various embodiments, the lath 114, the first sheet 115, the second sheet 116, and the third sheet 117 of the lath and rain screen assembly 110 may be substantially different in structure, shape, and/or configuration from the lath 14, the first sheet 15, the second sheet 16, and the third sheet 17 of the lath and rain screen assembly 10 illustrated in FIG. 3 and discussed above.

Referring again to FIG. 4, a portion of a building 140 is generally depicted as including an exterior facing wall 142 formed from a plurality of framing members 144. In various embodiments, the exterior wall 142 may be covered by exterior sheathing 146 attached to an exterior side of the framing members 144. In other embodiments, no exterior sheathing 146 may be incorporated. In those embodiments having an exterior sheathing 146, the exterior sheathing has an exterior surface 148. In the illustrated embodiment, the portion of the building 140, exterior wall 142, framing members 144 and exterior sheathing 146 are substantially the same as, or substantially similar to, the structure, shape, and/or configuration of the portion of the building 40, exterior wall 42, framing members 44 and exterior sheathing 46 illustrated in FIG. 3 and discussed above. Alternatively, the portion of the building 140, exterior wall 142, framing members 144 and exterior sheathing 146 can be substantially different in structure, shape, and/or configuration from that of the portion of the building 40, exterior wall 42, framing members 44 and exterior sheathing 46 illustrated in FIG. 3 and discussed above.

According to various embodiments, as shown in FIG. 4, a moisture resistant layer 150 may be fastened to the exterior surface 148 of the exterior sheathing 146 by staples (not shown). In certain embodiments, the lath and rain screen assembly 110 may be positioned over the moisture resistant layer 150 and fastened to the exterior sheathing 150 using a plurality of spaced apart fasteners 152. In these and other envisioned embodiments, a first layer 158 of mortar is applied such that it substantially encapsulates (e.g., envelops) the lath 114 such that when the first layer 158 is allowed to cure, it forms a base for a second layer 160 of mortar. In the illustrated embodiment, the moisture resistant layer 150, lath and rain screen assembly 110, first layer 158 of mortar and second layer of mortar 160 are substantially the same, or substantially similar in structure, shape, and/or configuration as the moisture resistant layer 50, lath and rain screen assembly 10, first layer 58 of mortar and second layer of mortar 60 illustrated in FIG. 3 and discussed above. Alternatively, in other various embodiments, the moisture resistant layer 150, lath and rain screen assembly 110, first layer 158 of mortar and second layer of mortar 160 may be substantially different in structure, shape, and/or configuration from the moisture resistant layer 50, lath and rain screen assembly 10, first layer 58 of mortar and second layer of mortar 60 illustrated in FIG. 3 and discussed above.

Referring again to FIG. 4, the second layer 160 of mortar, accordingly to various embodiments, forms a base for a layer of stucco material 164. In any of the various envisioned embodiments, the layer of stucco material can have any desired composition and can be any of a variety of desired thickness.

A method of installing a lath and rain screen assembly 10 according to various embodiments will now be described in detail with reference to FIG. 3. The first step of the method according to certain embodiments provides for positioning of the lath and rain screen assembly 10 adjacent an exterior sheathing 46 on a building portion 40. In other embodiments, the lath and rain screen assembly 10 may be positioned adjacent a moisture resistant layer 50 that has been previously attached to the exterior sheathing 46. In certain embodiments, the positioning of the lath and rain screen assembly 10, whether adjacent the exterior sheathing 46 or the moisture resistant layer 50 involves positioning the first sheet 15 of the rain screen 12 (see FIG. 2) adjacent the exterior sheathing or the moisture resistant layer. In this manner, in these and other envisioned embodiments, the second sheet 16 of the rain screen 12 is spaced from the exterior sheathing or the moisture resistant layer. In various embodiments, the positioning of the first and second sheets, 15 and 16, of the rain screen 12 create a first space 94 substantially between the exterior sheathing (or the moisture resistant layer, if present) and the second sheet 16, as discussed above in further detail.

The next step of the method according to various embodiments, involves the application of a first layer 58 of mortar to the lath 14 such that the first layer substantially encapsulates the lath 14, as generally depicted in FIG. 3. In certain embodiments, the method involves the application of a sufficient amount of mortar as the first layer 58 to totally encapsulate the lath 14. In other embodiments, the method involves the application of a sufficient amount of mortar as the first layer 58 to totally encapsulate the lath 14 and additionally encapsulate at least a portion of the thickness 56 of the third sheet 17 of the rain screen 12. In still other embodiments, the method involves the application of a sufficient amount of mortar as the first layer 58 to encapsulate the lath 14 along with approximately 90% of the thickness 56 of the third sheet 17 of the rain screen 12. In various embodiments, the method further comprises applying a second layer 60 of mortar after allowing the first layer 58 to cure. In certain of these embodiments, the second layer 60 provides a bedding layer for subsequent application of one or more masonry products 62.

Generally speaking, the installation of a lath and rain screen assembly 110, as shown in FIG. 4, may be accomplished in substantially the same manner as described above with respect to installation of the lath and rain screen assembly 10. Although, it should be understood that, in alternative embodiments, the installation of the lath and rain screen assembly 110 may be at least partially, or even substantially different than the manner as described above with respect to installation of the lath and rain screen assembly 10.

Various embodiments of the above-described lath and rain screen assemblies, 10 and 110, advantageously provide several benefits over traditional stand alone rain screens and laths, although all of the benefits may not be present in all embodiments. First, in certain embodiments, the lath and rain screen assemblies, 10 and 110, combine the traditional stand alone lath and the stand alone rain screen into a single integrated product, thereby allowing for reduced installation time and installation cost. Second, in certain embodiments, the lath and rain screen assemblies, 10 and 110, create at least one pathway between the moisture resistant layer and the sheet. In contrast, traditional rain screens may be cumbersome to install and inherently prone to trapping moisture between the moisture resistant layer and the rain screen.

The foregoing description of the various embodiments of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. The embodiments were chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled. The drawings and preferred embodiments do not and are not intended to limit the ordinary meaning of the claims in their fair and broad interpretation in any way. 

1. A lath and rain screen assembly configured for fastening to an exterior building surface, the lath and rain screen assembly comprising: A) a rain screen configured to encourage ventilation and drying, said rain screen including 1) a first substantially planar body, said first body having a nominal thickness and opposing primary planar first and second sides, said first body further defining a first plane; and 2) a second substantially planar body, said second body having a nominal thickness and opposing primary planar first and second sides, said first side being operably connected to said second side of said first body, said second body further defining a second plane, said second plane being substantially parallel to said first plane of said first body; and B) a lath configured to receive at least a portion of a first mortar layer, said lath including a third substantially planar body having a nominal thickness, said third body being operably connected to said second side of said second body, said third body further defining a third plane spaced apart from and substantially parallel to said first plane, such that at least said first body of said rain screen and said third body of said lath are spaced apart so as to provide a first intermediate pathway therebetween configured for permitting the passage of liquid water and water vapor.
 2. The lath and rain screen assembly of claim 1, wherein: said second body is formed from a permeable material; and said permeable material of said second body substantially defines said first intermediate pathway.
 3. The lath and rain screen assembly of claim 2, wherein said permeable material of said second body has a permeability value in a range of about 15 perms to about 35 perms.
 4. The lath and rain screen assembly of claim 1, wherein said connections between said second body of said rain screen and said third body of said lath are provided by heat bonding.
 5. The lath and rain screen assembly of claim 1, wherein said first intermediate pathway has a width of from about 0.0625 inches to about 0.50 inches, said width being defined at least in part by said nominal thickness of said second body.
 6. The lath and rain screen assembly of claim 1, wherein said nominal thickness of said second body is in a range of about 0.0625 inches to about 0.50 inches.
 7. The lath and rain screen assembly of claim 1, wherein said first body of said rain screen is formed from a polymer-based material.
 8. The lath and rain screen assembly of claim 7, wherein said polymer-based material is selected from a group consisting of: polyvinyl chloride, polystyrene, polyethylene, polypropylene, or any combination thereof.
 9. The lath and rain screen assembly of claim 1, wherein said nominal thickness of said first body is in a range of about 0.005 inches to about 0.50 inches.
 10. The lath and rain screen assembly of claim 1, wherein said rain screen further comprises a fourth substantially planar body, said fourth body having a nominal thickness and opposing primary planar first and second sides, said second side being operably connected to said first side of said first body, said first side defining a fourth plane, said fourth plane being spaced apart from and substantially parallel to said first plane of said first body.
 11. The lath and rain screen assembly of claim 10, wherein: said fourth body is formed from a permeable material; and said permeable material of said fourth body substantially defines a second intermediate pathway, said second pathway being located substantially between said fourth plane of said fourth body and said first plane of said first body, and said second pathway being configured for permitting the passage of liquid water and water vapor.
 12. The lath and rain screen assembly of claim 11, wherein said permeable material of said fourth body has a permeability value in a range of about 15 perms to about 35 perms.
 13. The lath and rain screen assembly of claim 10, wherein: said second body is formed from a permeable material; and said permeable material of said second body substantially defines said first intermediate pathway.
 14. The lath and rain screen assembly of claim 13, wherein said permeable material of said second body has a permeability value in a range of about 15 perms to about 35 perms.
 15. The lath and rain screen assembly of claim 13, wherein said permeable material of said second body and said permeable material of said fourth body are substantially the same.
 16. The lath and rain screen assembly of claim 11, wherein said second intermediate pathway has a width of from about 0.0625 inches to about 0.50 inches, said width being defined at least in part by said nominal thickness of said fourth body.
 17. The lath and rain screen assembly of claim 10, wherein said nominal thickness of said fourth body is in a range of about 0.0625 inches to about 0.50 inches.
 18. The lath and rain screen assembly of claim 1, wherein said first body is formed from a substantially impermeable material, said impermeable material having a permeability value in a range of about 0.06 perms to about 5 perms.
 19. The lath and rain screen assembly of claim 1, wherein said connections between said rain screen and said lath are provided by heat bonding.
 20. The lath and rain screen assembly of claim 1, wherein said lath includes a plurality of spaced apart apertures configured to permit passage of the first layer of mortar substantially through the lath.
 21. The lath and rain screen assembly of claim 1, wherein the lath is formed from a fiberglass-based material.
 22. The lath and rain screen assembly of claim 21, wherein said lath is formed by weaving the fiberglass-based material into a mesh configuration.
 23. The lath and rain screen assembly of claim 1, wherein said lath and rain screen assembly is capable of being stored in a rolled-up fashion.
 24. The lath and rain screen assembly of claim 1, wherein said lath has a width of from about 1/64 inches to about 0.25 inches, said width being defined at least in part by said nominal thickness of said third body.
 25. A method of providing a lath and rain screen assembly configured to be attached to an exterior building surface, said method comprising the steps of: A) providing a rain screen configured to encourage ventilation and drying, said rain screen including: 1) a first substantially planar body, said first body having a nominal thickness and opposing primary planar first and second sides, said first body further defining a first plane; and 2) a second substantially planar body, said second body having a nominal thickness and opposing primary planar first and second sides, said first side being operably connected to said second side of said first body, said second body further defining a second plane, said second plane being substantially parallel to said first plane of said first body; B) providing a lath configured to receive at least a portion of a first mortar layer, said lath including a third substantially planar body having a nominal thickness, said third body being operably connected to said second side of said second body, said third body further defining a third plane spaced apart from and substantially parallel to said first plane; and C) providing said lath and rain screen assembly by connecting said rain screen and said lath, such that at least said first body of said rain screen and said third body of said lath are spaced apart so as to provide a first intermediate pathway therebetween configured for permitting the passage of liquid water and water vapor.
 26. The method as claimed in claim 25, wherein in Step “C” said connection between said rain screen and said lath is provided by heat bonding.
 27. The method as claimed in claim 25, wherein in Step “C” said connection between said rain screen and said lath is provided by adhesive.
 28. The method as claimed in claim 25, wherein in Step “B” said lath is provided with apertures configured to permit passage of mortar therethrough.
 29. The method as claimed in claim 25, wherein in Step “A” said first body of said rain screen is provided with a permeability value in a range of about 0.06 perms to about 5 perms.
 30. The method as claimed in claim 25, wherein in Step “A” said second body of said rain screen is provided with a permeability value in a range of about 15 perms to about 35 perms.
 31. A method of applying a lath and rain screen assembly to an exterior building surface to facilitate the attachment of exterior cladding materials, said method comprising the steps of: A) providing a rain screen configured to encourage ventilation and drying, said rain screen including: 1) a first substantially planar body, said first body having a nominal thickness and opposing primary planar first and second sides, said first body further defining a first plane; and 2) a second substantially planar body, said second body having a nominal thickness and opposing primary planar first and second sides, said first side being operably connected to said second side of said first body, said second body further defining a second plane, said second plane being substantially parallel to said first plane of said first body; B) providing a lath configured to receive at least a portion of a first mortar layer, said lath including a third substantially planar body having a nominal thickness, said third body being operably connected to said second side of said second body, said third body further defining a third plane spaced apart from and substantially parallel to said first plane; C) providing said lath and rain screen assembly by connecting said rain screen and said lath, such that said first body of said rain screen and said third body of said lath are spaced apart so as to provide a first intermediate pathway therebetween configured for permitting the passage of liquid water and water vapor; D) positioning said lath and rain screen assembly adjacent said exterior building surface; E) applying a first layer of mortar onto said lath; and F) attaching a plurality of exterior cladding materials to said lath at least partially with the use of said mortar.
 32. The method as claimed in claim 31, wherein in Step “E” said first intermediate pathway receives at least a portion of a first layer of mortar.
 33. The method as claimed in claim 31, wherein in step “B” said lath is provided with a plurality of spaced apart apertures configured to permit passage of a portion of said first layer of mortar substantially through the lath in Step “E”, and wherein in Step “F”, said first layer of mortar, upon passing substantially through the lath, further substantially encapsulates the lath.
 34. The method as claimed in claim 31, wherein step “E” furthers comprises the step of applying a second layer of mortar onto said first layer of mortar once said first layer has been allowed to cure.
 35. The method as claimed in claim 31, wherein: A) said step “A” of providing a rain screen comprises a rain screen further including a fourth substantially planar body, wherein: 1) said fourth body has opposing primary planar first and second sides, said second side being operably connected to said first side of said first body, said first side defining a fourth plane, said fourth plane being spaced apart from and substantially parallel to said first plane of said first body; and 2) said fourth body substantially defines a second intermediate pathway, said second pathway being located substantially between said fourth plane of said fourth body and said first plane of said first body, and said second pathway being configured for permitting the passage of liquid water and water vapor; and B) said step “D” of positioning said lath and rain screen assembly adjacent said exterior building surface comprises positioning said first side of said fourth body of said rain screen in contact with the exterior building surface.
 36. The method as claimed in claim 35, wherein following Step “D” said second intermediate pathway has a width of from about 0.0625 inches to about 0.50 inches. 